A solitary lid mass was identified as a primary solitary plasmacytoma. A 71 year old male presented with a left upper lid mass. The mass was found to be firmly intermingled with the underlying tarsal plate. A total excision was successfully performed and the lid margin was reconstructed with a good cosmetic result. There were no positive findings in the systemic work-up. The light microscopic findings suggest that the mass is of tarsal plate origin. It is the first case of plasmacytoma of tarsal plate origin presented as a lid mass.